A numerical study of steady burning of spherical ethanol particles in a spray environment is presented. A spray environment is modeled as a high temperature oxidizer stream where the major products of combustion such as carbon dioxide and water vapor will be present along with reduced amounts of oxygen and nitrogen. The numerical model, which employs variable thermophysical properties, a global single-step reaction mechanism, and an optically thin radiation model, has been first validated against published experimental results for quasi-steady combustion of spherical ethanol particles. The validated model has been employed to predict the burning behavior of the ethanol particle in high temperature modified oxidizer environment. Results show that based on the amount of oxygen present in the oxidizer the burning rate constant is affected. The ambient temperature affects the burning rate constant only after a sufficient decrease in the oxygen content occurs. In pure air stream, ambient temperature variation does not affect the evaporation constant. Results in terms of burning rates, maximum temperature around the particle, and the evaporation rate constants are presented for all the cases. The variation of normalized Damköhler number is also presented to show the cases where combustion or pure evaporation would occur.
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September 2011
This article was originally published in
Journal of Heat Transfer
Technical Briefs
Numerical Modeling of Steady Burning Characteristics of Spherical Ethanol Particles in a Spray Environment
Vaibhav Kumar Sahu,
Vaibhav Kumar Sahu
Graduate Student
Department of Mechanical Engineering, IIT Madras, Chennai,
India
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Vasudevan Raghavan,
Vasudevan Raghavan
Assistant Professore
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Daniel N. Pope,
Daniel N. Pope
Associate Professor
Department of Mechanical Engineering,
University of Minnesota, Duluth
, MN 55812
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George Gogos
George Gogos
Professor
Department of Mechanical Engineering,
University of Nebraska, Lincoln
, NE 68588
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Vaibhav Kumar Sahu
Graduate Student
Department of Mechanical Engineering, IIT Madras, Chennai,
India
Vasudevan Raghavan
Assistant Professore
Daniel N. Pope
Associate Professor
Department of Mechanical Engineering,
University of Minnesota, Duluth
, MN 55812
George Gogos
Professor
Department of Mechanical Engineering,
University of Nebraska, Lincoln
, NE 68588J. Heat Transfer. Sep 2011, 133(9): 094502 (6 pages)
Published Online: August 1, 2011
Article history
Received:
January 14, 2011
Revised:
March 25, 2011
Accepted:
March 25, 2011
Online:
August 1, 2011
Published:
August 1, 2011
Citation
Kumar Sahu, V., Raghavan, V., Pope, D. N., and Gogos, G. (August 1, 2011). "Numerical Modeling of Steady Burning Characteristics of Spherical Ethanol Particles in a Spray Environment." ASME. J. Heat Transfer. September 2011; 133(9): 094502. https://doi.org/10.1115/1.4003905
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